Tamper pliers



July 29, 1947'.

T. HEERMANS TAMPER PLIERS Filed June 1, 1944 IN V EN TOR. 7h: ddezasfifleermmzs ATI'D R N EYE Patented July 29, 1947 UNITED STATES PATENT OFFICE The invention relates to pliers, and more especially to a tamper tool for use in insulating electric rotors, stators in constructing electric motors, generators and similar electric apparatus.

The primary object of the invention is the provision of a tool of this character, wherein the coil insulation in a rotor, stator or other like structure in the building of electric motors, generators and similar apparatus can be pressed into place or tamped with dispatch and accuracy, without excessive labor on the part of the operator of the tool.

Another object of the invention is the provision of a tool of this character, wherein the construction thereof is such that plier action is afforded thereby for the tamping of winding coils and insulation therefor into place in the erection of electric motors, generators or the like, without difficulty and breakage to the coils, insulation and adjuncts thereto.

A further object of the invention is the provision of a tool of this character, wherein the construction thereof is specially designed for electric motor, generator and similar apparatus and repairing thereof, and such tool is hand controlled and readily and easily operated.

A still further object of the invention is the provision of a tool of this character, which is simple in construction, easy to handle, thoroughly reliable and efficient in operation, strong, durable, quick acting, capable of being manipulated with one hand of an operator, applied and removed from the work with dispatch, and inexpensive to manufacture.

With these and other objects in View the invention consists in the features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawing, which discloses the preferred embodiment of the invention, and pointed out in the claims hereunto appended.

In the accompanying drawing:

Figure 1 is a side elevation of the tool constructed in accordance with the invention.

Figure 2 is a top plan view thereof.

Figure 3 is an end view showing the tool in position for tamping operation.

Figure 4 is a detail view of the holding jack of the tool.

Figure 5 is a detail side view of the tamping plunger of the tool.

Figure 6 is a sectional view taken on the line 6-6 of Figure 1 looking in the direction of the arrows.

Figure 7 is a sectional view taken on the line 1-1 of Figure 1 looking in the direction of the arrows.

Similar reference characters indicate corresponding parts throughout the several views in the drawing.

Referring to the drawing, A designates generally the tool constructed in accordance with the invention, while B fragmentarily denotes the r0- tor of an electric motor construction, with which the tool is specially designed for use in tamping the windings and insulation in place in the build ing or repairing of such rotor, which latter is of a conventional type.

The tool A comprises a pair of levers I 0 and l I, respectively, the latter intermediate of its length has built thereon a bearing I2 for a pivot swingingly connecting the lever l0 superposed to the said lever ll. These levers Ill and I l are formed with gripping handle ends [4. The lever ID at its end opposite the handle end I4 is bifurcated to receive therein a holding prop l5, which is pivoted at E6 in the said bifurcation and is formed with an abutment head I! having suitable clearances for the double legs [8 of a tamping plunger 19, which has the legs l8 detachably fitted in a bifurcated or forked end 20 of the lever l i. This tamping plunger l9 has a presser head 2 I, the legs l8 of which guide it in the movements thereof relative to the prop l5, which has its head I! superposed and next to the head 2|. The fasteners 22 secure the legs IS in the end 20.

Between the levers l0 and H next to the handle ends I4 is arranged a coiled compression spring 23 which urges the said levers apart at such handle ends, causing the plunger l 9 to move reversely to the movement of the prop [5 under such spring action.

The rotor B is shown formed with transverse slots 2 1 for coil winding, and each of these slots is provided with an entrance slit 25 which is considerably less in width than the said slot, the latter accommodating the windings indicated generally at 26, introduced therein through the slit 25, while co-acting with such windings are the insulating strips or mediums 21, and the purpose of the tool constituting the present invention is for tamping the windings and strip or medium in place within the slot 24 without damage thereto.

In the use of the tool for the purpose stated the heads I! and 2| in their normal close relation to each other are slipped into either of the opposite open ends of the slot 24 with the prop and plunger protruding through the slit 25 with the head I! of the prop making contact with the opposed edges 28 to the slit 25, and the head 2| of the plunger l9 overcasting the windings and insulation strip next thereto, so that when the tool A is operated by hand the plunger IS with its head 2| will press and temp such windings and insulation in place in the slot 24, the prop when engaging the edges 28 being for the purpose of holding the lever ID rigid and against movement relative to the plunger, which under movement of the lever l i will lower into the slot 24 and its head 2| tamp the windings and insulation confined within this slot. The tool A is released from the slot 24 by slipping it out through either open end thereof.

The tool is constructed in size corresponding to the character and size of the work to be operated upon for tamping purposes of the windings and insulation therefor in rotors, stators of electric motors, generators and other similar electrical apparatus.

What is claimed is:

1. A tool of the kind described, comprising a pair of pivotally connected levers superposed relative to each other, a holding prop for the uppermost lever and connected thereto and a tamping plunger having a pair of depending legs detachably fixed to the lowermost lever and slidably interfitted with the prop parallel therewith on opposite sides thereof in the same vertical plane.

2. A tool of the kind described comprising a pair of pivotally connected levers superposed relative to each other, a holding prop for the uppermost lever and pivotally connected thereto, a forked end on said lowermost lever, and a tamping plunger having a pair of depending legs detachably fitted in the forked end of the lowermost lever and slidably interfitted with the prop parallel therewith on opposite sides thereof in the same vertical plane.

3. A tool of the kind described, comprising a pair of pivotally connected levers superposed relative to each other, a holding prop for the uppermost lever and pivotally connected within the bifurcated end of said lever, a forked end on said lowermost lever, a tamping plunger having a pair of depending legs detachably fitted in the forked end of the lowermost lever and slidably interfitted with the prop parallel therewith on opposite sides thereof and in the same vertical plane, an abutment head on the holding prop, having slots in the ends thereof for reception of the depending legs of said plunger and a presser head on the plunger.

4. A tool of the kind described, comprising a pair of pivotall connecting levers, superposed relative to each other, a holding prop for the uppermost lever and pivotally connected within the bifurcated end of said lever, a forked end on said lowermost lever, a tamping plunger having a pair of depending legs detachably fitted in the forked end of the lowermost lever and slidably interfitted with the prop parallel therewith on opposite sides thereof and in the same vertical plane, an abutment head on the holding prop having slots in the ends thereof for reception of the depending legs of said plunger, a presser head on the plunger connecting the legs of said plunger and extending beyond the sides thereof and means acting on the levers to normally hold the said heads close together.

THADDEUS A. HEERMANS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,272,253 Cullin Feb. 10, 1942 1,557,259 Leland et a1 Oct. 13, 1925 1,465,905 Hoff Aug. 21, 1923 1,608,883 Justus Nov. 30, 1926 1,481,056 Gilbert Jan. 15, 1924 1,629,953 Foote May 24, 1927 711,912 Steudner Oct. 21, 1902 1,154,718 Neff Sept. 28, 1915 2,329,562 Stensrud Sept. 14, 1943 

